As it turns out, the winged-hourglass was a prescient symbol for a company that created numerous timepieces for pilots. In 1919, Longines became the official supplier to the International Aeronautical Federation; in 1925, a Longines accompanied aviator Antonio Locatelli on a flight to the North Pole region; and in 1926, Walter Mittelholzer wore a Longines when he flew from Switzerland to Iran.

But the association really took off, if you will, in 1927, when Charles Lindbergh made his solo flight across the Atlantic. A Longines measurement device at Roosevelt Field in Long Island marked the moment he took off; a similar Longines timepiece at Le Bourget Airfield in Paris where he landed recorded the time of the flight: 33 hours, 30 minutes, 29.8 seconds.

While in the air, Lindbergh had a lot of time to think about a lot of things, including the perfect watch, which he eventually designed for Longines. His Longines Lindbergh Hour Angle, introduced in 1932, used high-frequency quartz regulators to aid in the navigation of transatlantic flights by showing both Greenwich Mean Time and the corresponding hour angle. Needless to say, a Lindbergh Hour Angle from the 1930s is one of the most collectible antique Longines wristwatches available today.

The introduction of a wrist chronograph in 1936 allowed the aviation connection to continue in 1938, when Howard Hughes broke the speed record for a flight around the world. By the end of the 1930s, Longines had many steel-case watches designed specifically for pilots in its product line.

Calendars, water-resistance, and self-winding mechanisms were added as features to Longines watches during the 1940s. Gold and diamonds became more common as post-war prosperity allowed Longines to go after the luxury market.

And then, in 1954, Longines introduced one of its most enduring sports-lifestyle brands, the Conquest. The handsome Flagship followed in 1957. A vintage Conquest or Flagship from the 1950s is as prized by collectors today as it was by customers in the mid-20th century. Another collectible wristwatch to look from the late 1950s is the Jamboree.

Key terms for Antique and Vintage Longines Wristwatches:

Chronograph: A watch that also records time intervals, like a stopwatch.

Chronometer: A watch that has been certified by the Official Swiss Chronometer Testing Institute not to lose more than four seconds per day, nor to gain more than six.

Escapement: A device that converts the pressure of a spring or coil into a fixed release of movement.

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